class Product < ActiveRecord::Base
  validates :title, :description, :image_url, presence: true
  validates :price, numericality: {greater_than_or_equal_to: 0.01}
  validates :title, uniqueness: true
  validates :image_url, allow_blank: true, format: {
    with: %r{\A(http|https|file)\:\/\/([\w\d\/.-]+)?\.(gif|jpg|png)\z}i,
    message: 'Must be a URL for GIF, PNG, JPG images'
  } 
end
 